| glomus coccygeum | An arteriovenous (arteriolovenular) anastomosis supplied by the middle sacral artery and located on the pelvic surface of the coccyx. It was formerly called a gland (of Luschka) or a glomus and included with the paraganglia. Synonym: corpus coccygeum, arteriococcygeal gland, coccygeal gland, glomus coccygeum. (05 Mar 2000) |
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| glomus intravagale | A minute collection of chemoreceptor cells on the auricular branch of the vagus nerve. A tumour of this glomus may cause deafness and tinnitus. Synonym: glomus intravagale. (05 Mar 2000) |
| glomus jugulare | <radiology> Most common tumour in jugular fossa with intracranial extension, origin: adventitia of jugular bulb, location: dome of jugular bulb, symptoms: tinnitus, hearing loss, findings: destruction of posterioinferior petrous pyramid and corticojugular spine, soft tissue mass in jugular bulb region, hypotympanicum, middle ear, destruction of ossicles (usually incus), otic capsule, posteromedial surface of petrous bone, MRI: salt and pepper appearance (multiple tumour vessels), angio: hypervascular mass; invasion/obstruction of the jugular bulb by thrombus/tumour; AV shunting, malignant transformation with metastasis to regional nodes (2-4%) see: paraganglioma (glomus tumour) (12 Dec 1998) |
| glomus jugulare tumour | A paraganglioma involving the glomus jugulare, a microscopic collection of chemoreceptor tissue in the adventitia of the bulb of the jugular vein. It may cause paralysis of the vocal cords, attacks of dizziness, blackouts, and nystagmus. It is not resectable but radiation therapy is effective. It regresses slowly, but permanent control is regularly achieved. (12 Dec 1998) |
| glomus pulmonale | A structure similar to the carotid body, found in relation to the pulmonary artery. Synonym: glomus pulmonale. (05 Mar 2000) |
| glomus tumour | A blue-red, extremely painful paraganglioma involving a glomeriform arteriovenous anastomosis (glomus body), which may be found anywhere in the skin, most often in the distal portion of the fingers and toes, especially beneath the nail. They may also occur in the stomach and nasal cavity. It is composed of specialised pericytes (sometimes termed glomus cells), usually in single encapsulated nodular masses which may be several millimeters in diameter. When located in the usual subungual site, the abundant innervation makes the tumour exquisitely painful; when located elsewhere, the glomus tumour is painless. (12 Dec 1998) |
| glomus tympanicum | <radiology> Paraganglioma of middle ear, most common neoplasm of middle ear, arises from tympanic branch of glossopharyngeal nerve, arterial supply: ascending pharyngeal artery, (arises at bifurcation: do CCA injection), glomus JUGULARE is most common tumour of temporal bone (12 Dec 1998) |
| choroid glomus | A marked enlargement of the choroid plexus of the lateral ventricle at the junction of the central part with the inferior horn. Synonym: glomus choroideum, choroid skein. (05 Mar 2000) |
| pulmonary glomus | A structure similar to the carotid body, found in relation to the pulmonary artery. Synonym: glomus pulmonale. (05 Mar 2000) |
| intravagal glomus | A minute collection of chemoreceptor cells on the auricular branch of the vagus nerve. A tumour of this glomus may cause deafness and tinnitus. Synonym: glomus intravagale. (05 Mar 2000) |
| jugular glomus | A microscopic collection of chemoreceptor tissue in the adventitia of the jugular bulb; a tumour of this glomus may cause paralysis of the vocal cords, attacks of dizziness, blackouts, and nystagmus. Synonym: glomus jugulare. (05 Mar 2000) |
| anastomosis | <surgery> An opening created by surgical, traumatic or pathological means between two normally separate spaces or organs. (04 May 1997) |
| anastomosis arteriovenosa | <anatomy> A vessel that directly interconnects an artery and a vein, and that acts as a shunt to bypass the capillary bed. Not to be confused with surgical anastomosis, nor with arteriovenous fistula. (12 Dec 1998) |
| anastomosis, roux-en-y | A y-shaped surgical anastomosis of any part of the digestive system which includes the small intestine as the eventual drainage site. (12 Dec 1998) |
| anastomosis, surgical | Surgical union or shunt between ducts, tubes or vessels. It may be end-to-end, end-to-side, side-to-end, or side-to-side. (12 Dec 1998) |